| commit | 7e768532b2396bcb7fbf6f82384b85c0f1d2f197 | [log] [tgz] |
|---|---|---|
| author | Mikulas Patocka <mpatocka@redhat.com> | Tue May 25 13:17:19 2021 -0400 |
| committer | Mike Snitzer <snitzer@redhat.com> | Tue May 25 16:19:58 2021 -0400 |
| tree | 7397bddfe9ebf6e2f5586e805b00ae0532f67b76 | |
| parent | f16dba5dc6f094041ab8c356e1e3a48ee0e3c8cd [diff] |
dm snapshot: properly fix a crash when an origin has no snapshots If an origin target has no snapshots, o->split_boundary is set to 0. This causes BUG_ON(sectors <= 0) in block/bio.c:bio_split(). Fix this by initializing chunk_size, and in turn split_boundary, to rounddown_pow_of_two(UINT_MAX) -- the largest power of two that fits into "unsigned" type. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Mike Snitzer <snitzer@redhat.com>